A857 SA
ephemeris date magn radius delta ra dec elong phase
Opposition25 Sep 202211.23.039 AU2.036 AU00h09m+01°11'179.5°0.2°
Today6 Oct 202211.53.032 AU2.047 AU00h02m+00°02'168.1°3.9°
A857 SA - 2022-10-06
astro.vanbuitenen.nl


 
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The interactive orbit chart above shows the body's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of A857 SA are:

            e (Eccentricity)                : 0.0695866
            a (Semimajor axis)              : 3.1189995
            i (Inclination)                 : 6.55700
            Ω (Longitude of ascending node) : 183.44858
            ω (Argument of perihelion)      : 251.02115
            M (Mean anomaly)                : 286.91897
            Epoch                           : 2022 Aug 09

            L (Longitude of perihelion)     : 254.35379
            B (Latitude of perihelion)      : -6.19911
            P (Orbital period in years)     : 5.51            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.


The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.





The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes. A more printer-friendly version of the same chart can be found below.




Ephemerides:
Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2022-10-06 00:00 UT   00 02 03.6   +00 02 51     2.047    3.032  168.1    3.9    66   11.5 
2022-10-06 18:13 UT   00 01 33.8   +00 01 58     2.049    3.031  167.2    4.2    66   11.5 
2022-10-07 00:00 UT   00 01 24.3   +00 03 29     2.049    3.031  166.9    4.3    66   11.5 
2022-10-08 00:00 UT   00 00 45.6   +00 09 45     2.052    3.031  165.7    4.7    66   11.6 
2022-10-09 00:00 UT   00 00 07.3   +00 15 57     2.055    3.030  164.5    5.0    66   11.6 
2022-10-10 00:00 UT   23 59 29.7   +00 22 04     2.059    3.029  163.4    5.4    66   11.6 
2022-10-11 00:00 UT   23 58 52.7   +00 28 07     2.063    3.029  162.2    5.8    66   11.6 
2022-10-12 00:00 UT   23 58 16.3   +00 34 04     2.067    3.028  161.0    6.1    66   11.7 
2022-10-13 00:00 UT   23 57 40.7   +00 39 57     2.071    3.028  159.9    6.5    66   11.7 
2022-10-14 00:00 UT   23 57 05.8   +00 45 44     2.076    3.027  158.7    6.9    66   11.7 
2022-10-15 00:00 UT   23 56 31.6   +00 51 25     2.080    3.026  157.6    7.2    66   11.7 
2022-10-16 00:00 UT   23 55 58.3   +00 57 00     2.086    3.026  156.4    7.6    65   11.7 
2022-10-17 00:00 UT   23 55 25.8   -01 02 29     2.091    3.025  155.2    7.9    65   11.8 
2022-10-18 00:00 UT   23 54 54.2   -01 07 51     2.096    3.024  154.1    8.3    65   11.8 
2022-10-19 00:00 UT   23 54 23.5   -01 13 07     2.102    3.024  153.0    8.6    65   11.8 
2022-10-20 00:00 UT   23 53 53.7   -01 18 15     2.108    3.023  151.8    9.0    65   11.8 
2022-10-21 00:00 UT   23 53 25.0   -01 23 16     2.115    3.022  150.7    9.3    65   11.8 
2022-10-22 00:00 UT   23 52 57.2   -01 28 09     2.121    3.022  149.5    9.6    65   11.9 
2022-10-23 00:00 UT   23 52 30.4   -01 32 55     2.128    3.021  148.4    9.9    65   11.9 
2022-10-24 00:00 UT   23 52 04.7   -01 37 33     2.135    3.021  147.3   10.3    65   11.9 
2022-10-25 00:00 UT   23 51 40.1   -01 42 03     2.143    3.020  146.2   10.6    65   11.9 
2022-10-26 00:00 UT   23 51 16.6   -01 46 24     2.150    3.019  145.0   10.9    65   11.9 
2022-10-27 00:00 UT   23 50 54.2   -01 50 37     2.158    3.019  143.9   11.2    66   12.0 
2022-10-28 00:00 UT   23 50 33.0   -01 54 42     2.166    3.018  142.8   11.5    66   12.0 
2022-10-29 00:00 UT   23 50 13.0   -01 58 37     2.174    3.017  141.7   11.8    66   12.0 
2022-10-30 00:00 UT   23 49 54.1   -02 02 24     2.182    3.017  140.6   12.1    66   12.0 
2022-10-31 00:00 UT   23 49 36.4   -02 06 01     2.191    3.016  139.5   12.3    66   12.0 
2022-11-01 00:00 UT   23 49 20.0   -02 09 30     2.200    3.016  138.5   12.6    66   12.1 
2022-11-02 00:00 UT   23 49 04.8   -02 12 49     2.209    3.015  137.4   12.9    66   12.1 
2022-11-03 00:00 UT   23 48 50.8   -02 15 60     2.218    3.014  136.3   13.1    66   12.1 
2022-11-04 00:00 UT   23 48 38.1   -02 19 00     2.228    3.014  135.2   13.4    66   12.1 
2022-11-05 00:00 UT   23 48 26.6   -02 21 52     2.237    3.013  134.2   13.7    66   12.1 


    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.